Shovel-excavator and operating means therefor



T. C. ARPE SHOVEL EXCAVATOR AN D OPERATING MEANS THEREFOR.

APPLICATION FILED OCT. 12. 1917.

Patented Oct. 5, 19205,

2 SHEETS-SHEET I T. C. ARPE SHOVEL EXCAVATOR AND OPERATING MEANSTHEREFORy APPLICATION FILED OCT. 2, I912.

Patented Oct. 5, 1920.

2 SHEETS-SHEET 2- 34mm mtoz Z a ZIWQ.

I 6120214 a a THEODOR G. ARPE, OF PORTLAND, OREGON.

SHOVEL-EXCAVATOR AND OPERATING MEANS THEREFOR.

Application filed October 12, 1917.

To all whom it may concern Be it known that I, THEODOR O. ARPE, acitizen of the United States, residing at Portland, in the county ofMultnomah, State of Oregon, have invented a new and useful ShovelExcavator and Operating Means Therefor; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to an improved dredging shovel excavator andmeans for operating the same, particularly adapted for use in connectionwith machinesfor dredging gold and similar minerals, but may beconstructed for other dredging.

One of the objects of the invention is the provision of a lifting boom,and a dredging shovel or scoop, the handle of which is pivotally andslidably mounted on the boom, whereby, as the boom is raised and theshovel or scoop drawn toward the apparatus, said scoop or shovel may bepositioned so that its contents may be deposited or dumped into atrough.

A further object of the invention is the provision of a suitable turntable especially adapted for carrying the lifting boom and the operatingmeans therefor,

In practical fields, the details of construction may necessitatealterations falling within the scope of what is claimed.

The invention comprises further features and combination of parts, ashereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view in side elevation of a dredgingmachine showing the improved.

shovel excavator and operating means applied. Fig. 2 is a perspectiveview of a portion of the lifting boom and the part of the beam or arm 36and its sliding connection with the boom. Fig. 3 is a plan view of thesupporting block for the arm or beam 36. Fig. 4 is a sectional viewthrough the su porting block for the beam or arm 36.

fteferring more especially to the drawdesignates the base or platformwhich ings, 1

parts of the apparatus.

carries the main Beneath the platform adjacent the opposite sidesthereof, elongated strips 2 are held spaced from the under face of theplatform by the supporting blocks 3, thereby providing su ports for thesupportlng flanged wheels 4 J Specification of Letters Patent.

pintles of said rollers.

which are mounted in bearings 5) Patented Oct. 5, 1920.

Serial No. 196,158.

necting the outer sides of the rear end of i the bars or rods 20 and 21,are the side plates 22, which are bolted or otherwise secured to saidbars or rods, as shown at 23. By means of the headed pins 24, saidplates 22 are pivoted on the bearings or brackets 19, thereby pivotallymounting the lifting boom. A head block 25 is provided for the outer endof the boom, the outer end portions of the bars or rods 20 and 21 arebolted or secured, as at 26, to said block. Secured to the outer edgesor faces of the bars 20 and 21, as at 27, substantially midway the endsof the boom, are the plates 28. A swiveled plate, block or member 29 hasits laterally extending pins 30 mounted in bearings of said plates 28.This block or plate 29 has an opening 31 provided with six faces orsides 32 and 33. The faces 33 are recessed, to receive the rollers 33,and their babbitt bearings 34, which receive the These recesses 33 openalso toward the upper face of the block or plate 29, whereby saidrollers and their bearings may drop into place. Suitable bolts or screws33 are threaded through the block or plate 29 in their arrangement, asshown in Figs. 3 and 4, whereby the inner ends of said screws or boltsmay extend slightly into the babbitt bearings and hold them and theirrollers in place. A scoop or shovel of an improved type is provided andprojecting from the shovelor scoop '35 is a beam or arm 36. This beam orarm in cross section is hexagon shape, in other words it is providedwith six faces, and wear plates 34 angular in cross section are securedby screws 34 to the arm or'beam, are fastened to adjacent faces of thearm or beam, in order to be engaged by the antifrictional rollers 33, asthe 'arm or beam moves through the block or plate. It is to be observedthat owing to the pivotal mounting of the block or plate 29, the scoopor shovel is capable of pivoting relative to in any suitable manner.

the boom, as the shovel or scoop is drawn toward the apparatus, and whenthe boom is hoisted. Also by reason of the beam or arm 3.6 beingslidably mounted in said block or member 29, the scoop or shovel iscapable of being raised or lowered, as the case may be, without hoistingor raising the boom.

. The scoop or shovel 35 comprises a sheet metal casing consisting of atop 39 and bottom 40, and the two ends 41. Each end has an end plate 43connecting the top and bottom pieces of scoop casing. The end plates ofthescoop are secured and reinforced to the top and bottom pieces and thestrips by means of the frame 44, which is constructed angular in crosssection. The frames 44 have transverse bars 45 to which the end plates43 are secured at 46, said bars 45 having pintles 47, to which the endsof the arms of the bails 51 and 52 are connected pivotally. The scoophas its front and backopen, and the open back is normally closed by theclosure 48, which has ears.49. These ears are pivoted at 50 to the lugs50, and by means of the sliding spring tensioned bolt or latch 50 (thespring of which is not shown), the closure is held secure when closed.The beam or arm 36 is rigidly secured to the top of the scoop Thebot-tom of the scoop has an extended portion 53 provided with a cuttingedge 54", whereby the forward portion of the bottom of the scoop willcut into the material to be dredged. The bails 51 and 52 have eyes 53and 54 and to the eye 54 a cable 55 is connected. This cable 55 passesover a suitable pulley 56, which is carried by the block at the end ofthe boom. This cable 55 passes backwardly toward the portable structureof the apparatus, and is connected to any suitable hoisting engine,whereby the cable 55 may be drawn in or let out, for manipulating theshovel or scoop toward the portable structure of the apparatus oroutwardly toward the end of the boom. Connected to the eye 53 of thebail 51 is a cable 60, which passes over the pulley 61, and is in turnconnected to an engine on the platform 1 which engine imparts movementto the cable 60 in either direction. It is to be noted that bymanipulating the cables 55 and 60 the shovel or scoop may be movedtoward and from the portable structure or frame of the dredgingapparatus. The outer faces of the bars or rods 20 and 21 are braced bythe zigzag braces 64. The upper face of the block or head of the liftingboom has an eye to which the cable 66 is connected. This cable, in turn,passes over the pulley 67, and has its other end portion connected to anengine on the platform 1, by means of which engine the cable may becontrolledv and the boom raised or lowered as desired.

In dredging gold or other minerals, the material is scooped or shoveledfrom its bed by the manipulation of the scoop, and then the scoop is'operated so that it may be positioned over the upper. end of the chute79, after which the closure 48 is unlatched, and the material allowed topass'down the chute, where it is gathered, and conveyed upwardly by anysuitable means (not shown) and allowed to dump into the separating drum75.

The invention having been set forth what is claimed as new and usefulis 1. In an apparatus as set forth, the combination with a revolvingbase, of a skele: ton boom, pivotally mounted thereon, bearing platessecured to the sides of said boom between its ends, a hexagonal shapedguide block having laterally extending axially alined trunnions rockablymounted in said bearing plates, said guide block having a centralcorrespondingly shaped opening provided with anti-frictional rollerbearings, an excavating shovel, a stick secured thereto, correspondinglyshaped in cross section to and guided through'said opening on saidroller bearings, means connected to the shovel for operating the sameforwardly and rearwardly, the stick sliding movably through the openingand the block rocking at the same time in its bearing.

2. In an apparatus as set forth, the combination with a revolving base,of a skeleton boom pivotally mounted thereon, bearing plates secured tothe side of said boom between its ends, a guide block having laterally.extended axially alined trunnions rockably mounted in said bearingplates, said guide block having a hexagonally shaped opening,antifrictional roller bearings within said hexagonal shaped opening, oneroller being so mounted in each of the walls of adjacent walls of theopening so as to form said adjacent walls, an excavating shovel, a sticksecured thereto, said stick being correspondingly shapedto and guidedthrough said opening on said roller bearings, means connected to theshovel for operating the same forwardly and rearwardly, the sticksliding movably through the opening and the block rocking at the sametime in its bearing.

3. In an apparatus as set forth, the combination with a revolving base,of a skeleton boom pivotally mounted thereon, bearing plates secured tothe sides of said boom between its ends, a guide block having laterallyextending axially alined trunnions rockably mounted in said bearingplates, said block havinga hexagonally shaped opening, a roller bearingpivotally mounted in the walls of the ends of the opening, a stickhaving an excavating shovel thereon, said stick being hexagonally shapedand disposed within the hexagonal shaped opening of the block, saidstick being narrower in width than the openin of the block, the forwardand rear sides 0. said stick being in slidable engagement with therollers in the end walls of the hexagonally shaped openin said stickbeing said openlng on said rollers, means connected to the shovel foroperating the same forwardly and rearwardly, the stick sliding movablythrough the opening and the block rocking at the same time in itsbearing.

, 4, In an apparatus as set forth, the combination with a revolvingbase, of a skeleton boom pivotally mounted thereon, bearing platessecured to the sides of said boom between its ends, a. guide blockhaving laterall extendin axially alined trunnions rockab y mounte insaid bearing plates, said block having a hexagonally shaped opening,

roller bearmgs pivotally mounted in the walls at the ends of thehexagonal opening,

adapted to be guided t rough.

a stick having an excavating shovel thereon, saidstick being hexagonallyshaped and of less transverse thickness than the transverse width of thehexagonal shaped opening), the forward and rear sides of said stick eingprovided with wear plates in slidable engagement with the rollers in thewalls of the hexagonally shaped opening, said stick being adapted to beguided through said opening 'on said rollers, means connectedto theshovel for operating the same forwardly and rearwardly, the sticksliding movably through the opening and the block rocked

